QualType ArgTypeResult::getRepresentativeType(ASTContext &C) const {
switch (K) {
case InvalidTy:
assert(false && "No representative type for Invalid ArgTypeResult");
// Fall-through.
case UnknownTy:
return QualType();
case SpecificTy:
return T;
case CStrTy:
return C.getPointerType(C.CharTy);
case WCStrTy:
return C.getPointerType(C.getWCharType());
case ObjCPointerTy:
return C.ObjCBuiltinIdTy;
case CPointerTy:
return C.VoidPtrTy;
case WIntTy: {
QualType WC = C.getWCharType();
return WC->isPromotableIntegerType() ? C.getPromotedIntegerType(WC) : WC;
}
}
// FIXME: Should be unreachable, but Clang is currently emitting
// a warning.
return QualType();
}
clang::analyze_format_string::ArgType::MatchKind
ArgType::matchesType(ASTContext &C, QualType argTy) const {
if (Ptr) {
// It has to be a pointer.
const PointerType *PT = argTy->getAs<PointerType>();
if (!PT)
return NoMatch;
// We cannot write through a const qualified pointer.
if (PT->getPointeeType().isConstQualified())
return NoMatch;
argTy = PT->getPointeeType();
}
switch (K) {
case InvalidTy:
llvm_unreachable("ArgType must be valid");
case UnknownTy:
return Match;
case AnyCharTy: {
if (const EnumType *ETy = argTy->getAs<EnumType>())
argTy = ETy->getDecl()->getIntegerType();
if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
switch (BT->getKind()) {
default:
break;
case BuiltinType::Char_S:
case BuiltinType::SChar:
case BuiltinType::UChar:
case BuiltinType::Char_U:
return Match;
}
return NoMatch;
}
case SpecificTy: {
if (const EnumType *ETy = argTy->getAs<EnumType>())
argTy = ETy->getDecl()->getIntegerType();
argTy = C.getCanonicalType(argTy).getUnqualifiedType();
if (T == argTy)
return Match;
// Check for "compatible types".
if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
switch (BT->getKind()) {
default:
break;
case BuiltinType::Char_S:
case BuiltinType::SChar:
case BuiltinType::Char_U:
case BuiltinType::UChar:
return T == C.UnsignedCharTy || T == C.SignedCharTy ? Match
: NoMatch;
case BuiltinType::Short:
return T == C.UnsignedShortTy ? Match : NoMatch;
case BuiltinType::UShort:
return T == C.ShortTy ? Match : NoMatch;
case BuiltinType::Int:
return T == C.UnsignedIntTy ? Match : NoMatch;
case BuiltinType::UInt:
return T == C.IntTy ? Match : NoMatch;
case BuiltinType::Long:
return T == C.UnsignedLongTy ? Match : NoMatch;
case BuiltinType::ULong:
return T == C.LongTy ? Match : NoMatch;
case BuiltinType::LongLong:
return T == C.UnsignedLongLongTy ? Match : NoMatch;
case BuiltinType::ULongLong:
return T == C.LongLongTy ? Match : NoMatch;
}
return NoMatch;
}
case CStrTy: {
const PointerType *PT = argTy->getAs<PointerType>();
if (!PT)
return NoMatch;
QualType pointeeTy = PT->getPointeeType();
if (const BuiltinType *BT = pointeeTy->getAs<BuiltinType>())
switch (BT->getKind()) {
case BuiltinType::Void:
case BuiltinType::Char_U:
case BuiltinType::UChar:
case BuiltinType::Char_S:
case BuiltinType::SChar:
return Match;
default:
break;
}
return NoMatch;
}
case WCStrTy: {
const PointerType *PT = argTy->getAs<PointerType>();
if (!PT)
return NoMatch;
QualType pointeeTy =
C.getCanonicalType(PT->getPointeeType()).getUnqualifiedType();
return pointeeTy == C.getWideCharType() ? Match : NoMatch;
}
case WIntTy: {
QualType PromoArg =
argTy->isPromotableIntegerType()
? C.getPromotedIntegerType(argTy) : argTy;
QualType WInt = C.getCanonicalType(C.getWIntType()).getUnqualifiedType();
PromoArg = C.getCanonicalType(PromoArg).getUnqualifiedType();
// If the promoted argument is the corresponding signed type of the
// wint_t type, then it should match.
if (PromoArg->hasSignedIntegerRepresentation() &&
C.getCorrespondingUnsignedType(PromoArg) == WInt)
return Match;
return WInt == PromoArg ? Match : NoMatch;
}
case CPointerTy:
if (argTy->isVoidPointerType()) {
return Match;
} if (argTy->isPointerType() || argTy->isObjCObjectPointerType() ||
argTy->isBlockPointerType() || argTy->isNullPtrType()) {
return NoMatchPedantic;
} else {
return NoMatch;
}
case ObjCPointerTy: {
if (argTy->getAs<ObjCObjectPointerType>() ||
argTy->getAs<BlockPointerType>())
return Match;
// Handle implicit toll-free bridging.
if (const PointerType *PT = argTy->getAs<PointerType>()) {
// Things such as CFTypeRef are really just opaque pointers
// to C structs representing CF types that can often be bridged
// to Objective-C objects. Since the compiler doesn't know which
// structs can be toll-free bridged, we just accept them all.
QualType pointee = PT->getPointeeType();
if (pointee->getAsStructureType() || pointee->isVoidType())
return Match;
}
return NoMatch;
}
}
llvm_unreachable("Invalid ArgType Kind!");
}
bool ArgTypeResult::matchesType(ASTContext &C, QualType argTy) const {
switch (K) {
case InvalidTy:
assert(false && "ArgTypeResult must be valid");
return true;
case UnknownTy:
return true;
case SpecificTy: {
argTy = C.getCanonicalType(argTy).getUnqualifiedType();
if (T == argTy)
return true;
// Check for "compatible types".
if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
switch (BT->getKind()) {
default:
break;
case BuiltinType::Char_S:
case BuiltinType::SChar:
return T == C.UnsignedCharTy;
case BuiltinType::Char_U:
case BuiltinType::UChar:
return T == C.SignedCharTy;
case BuiltinType::Short:
return T == C.UnsignedShortTy;
case BuiltinType::UShort:
return T == C.ShortTy;
case BuiltinType::Int:
return T == C.UnsignedIntTy;
case BuiltinType::UInt:
return T == C.IntTy;
case BuiltinType::Long:
return T == C.UnsignedLongTy;
case BuiltinType::ULong:
return T == C.LongTy;
case BuiltinType::LongLong:
return T == C.UnsignedLongLongTy;
case BuiltinType::ULongLong:
return T == C.LongLongTy;
}
return false;
}
case CStrTy: {
const PointerType *PT = argTy->getAs<PointerType>();
if (!PT)
return false;
QualType pointeeTy = PT->getPointeeType();
if (const BuiltinType *BT = pointeeTy->getAs<BuiltinType>())
switch (BT->getKind()) {
case BuiltinType::Void:
case BuiltinType::Char_U:
case BuiltinType::UChar:
case BuiltinType::Char_S:
case BuiltinType::SChar:
return true;
default:
break;
}
return false;
}
case WCStrTy: {
const PointerType *PT = argTy->getAs<PointerType>();
if (!PT)
return false;
QualType pointeeTy =
C.getCanonicalType(PT->getPointeeType()).getUnqualifiedType();
return pointeeTy == C.getWCharType();
}
case WIntTy: {
// Instead of doing a lookup for the definition of 'wint_t' (which
// is defined by the system headers) instead see if wchar_t and
// the argument type promote to the same type.
QualType PromoWChar =
C.getWCharType()->isPromotableIntegerType()
? C.getPromotedIntegerType(C.getWCharType()) : C.getWCharType();
QualType PromoArg =
argTy->isPromotableIntegerType()
? C.getPromotedIntegerType(argTy) : argTy;
PromoWChar = C.getCanonicalType(PromoWChar).getUnqualifiedType();
PromoArg = C.getCanonicalType(PromoArg).getUnqualifiedType();
return PromoWChar == PromoArg;
}
case CPointerTy:
return argTy->isPointerType() || argTy->isObjCObjectPointerType() ||
argTy->isNullPtrType();
case ObjCPointerTy:
return argTy->getAs<ObjCObjectPointerType>() != NULL;
}
// FIXME: Should be unreachable, but Clang is currently emitting
// a warning.
return false;
}